I just bought new Macbook pro Intel 17 2.0 GHz running OS X Lion in it and I have installed virtual DJ software in it. I bought the Macbook because it is more reliable. Before buying Macbook pro I had dell studio dual core which was running windows 7. Mixing virtual DJ in my dell studio was the great experience no matter what ever the file format I used, and now when I play same virtual DJ in my Macbook pro it lagging and found jitter sync problem also it donít play some of file format like MKV and MP4. Guyís please tell me solution how can I fix this virtual DJ problem.